using super effective Pokemon against his' Pokemon you'll need a super effective Pokemon against his starter but you don't need to win with super effective Pokemon just stock up on potions that's what I do.
Cheren is a guy
enter the Pokemon league
Victory road
When you get to the end of the victory road in pokemon white or black, you will fight with cheren, your main rival. He will be quite strong (he will have his main pokemon at level 65 and all others at 63). To beat him, just use type advantages or use pokemon higher than 63 in level.
I jusr completed Pokemon white and Cheren is in the town where you first meet Alder. He is standing by the gate thingy by the fence.
The elite four, the champion, (Cheren, Bianca,you have to find them)and,(Cynthia,after you beat the game)
You can get surf in Pokemon black and white by battling Cheren at the Twisted Mountain. Then Champion Alder will give both you can Cheren th HM Surf.
You can get surf in Pokemon black and white by battling Cheren at the Twisted Mountain. Then Champion Alder will give both you can Cheren th HM Surf.
You can get surf in Pokemon black and white by battling Cheren at the Twisted Mountain. Then Champion Alder will give both you can Cheren th HM Surf.
Alder gives it to you when you beat Cheren at Twist Mountain.
Cheren
on route 6you get it from cheren